These delightful chromolithographs detailing the house visitors were produced by Julie Conz to accompany short verses composed by Julie Neunhöffer. This high quality book was issued by the Attenkofer Publishing Company in 1910 in Straubing in Lower Saxony Bavaria. There is very little else by way of web mentions of the authors or the book - WorldCat lists this book as the only publication by either of the Julies. [I thought I saw a sale for ~€3000 but I can't re-find it so maybe I imagined it]

The quality is what I expect of late 19th c | early 20th c. Philadelphia/New York printing. I'm not sure I've seen such good quality German book lithos from around the same date (or [m]any other places for that matter). This is the sort of book you expect to see on the Library of Congress site. (having said that, the illustrations I omitted had some slight multi-stone ghosting [like you see in newspaper comics] so it's not a perfect copy.